Electromagnetic pulse propagation in a quantum metamaterial, an artificial, globally quantum coherent optical medium, is numerically simulated. We show that a one-dimensional quantum metamaterial based on superconducting quantum bits, initialized in an easily reachable factorized excited state, demonstrates lasing in the microwave range, accompanied by the chaotization of qubit states and generation of higher harmonics. These effects may provide a tool for characterization and optimization of quantum metamaterial prototypes.

Description:

The published version of the article is also available at [http://dx.doi.org/10.1103/PhysRevB.91.134513]

Sponsor:

This work was supported by Japan Society for the Promotion of Sciences Fellows,(Grant No.26790062), (Grant No. 24510146 and the Ministry of Education and
Science of the Russian Federation in the framework of Increase
Competitiveness Program of NUST “MISiS” (Grant No. K2-2014-015)